Shade-roller



No. 68,800. Patented Nov. 8, I898. E. F. HARTSHURN.

SHADE ROLLER.

(Application filed. Aug. 1.1, [897.)

(No Model.)

UNITE STATES EDMUND F. HARTSHORN, OF NEWARK, NEW JERSEY, ASSIGNOR TO THESTEWART HARTSHORN COMPANY, OF NEIV JERSEY.

SHADE-ROLLER.

SPECIFICATION forming part of Letters Patent No. 613,800, dated November8, 1898.

Application filed August 11, 1897. Serial No. 647,815. tNo model.)

To all whom it may concern:

Be it known that I, EDMUND F. HARTSHORN, a citizen of the United States,and a resident of Newark, in the county of Essex and State of NewJersey, have invented certain new and useful Improvements in ShadeRollers, of which the following is a specification.

Myimprovement relates to that class of rollers known asextension-rollers, in which the roller is in separate sections or parts,one of which slides within the other, whereby the roller can be adjustedto fit windows of different widths. In such rollers the inner slidingsection is usually constructed of wood, which slides within the metaltube or outer portion of the roller. As wood under the varying changesof the atmosphere is apt to swell or shrink,-this wood portion of theroller is liable to increase or diminish in diameter,andl1ence either tobind in the outer tube, so that it is difficult to slide the parts oneach other to adjust the length of the roller, or to become so,

loose that the parts move and turn in each other and the roller ceasesto be firm and steady.

My improvement consists in a novel con-f struction of this woodenextension-piece of the roller by which the variations in the wood due toswelling and shrinking are compensated and the roller maintained atafixed diameter and all binding or loosening of the Wooden section inthe outer tube is prevented.

In the accompanying drawings, illustrating my improvement, Figure 1 is aview of the complete roller. Fig. 2 is a view of the woodextension-piece, showing my improvement. Fig. 3 is a section of theroller through the line no 00, Fig. 1; and Fig. 4 is a detached view ofthe spring.

a is the wooden eXtension-piece,which slides in the outer metal tube b.

In constructing the roller according to my improvement I cut a slit orcleft c in the end of the wooden section near the edge and for abouttwo-thirds of the length of the section, so as to form a tongue orsemidetached portion d along the surface of the section. In this cleft cor the space under the tongue I insert a spring 6, by which the tongueis pushed outward from the section and by means of which the tongue iscaused to act as a spring and press against the inside of the outermetal tube when the wooden section is inserted in the same. As will bereadcompressed or pressed inward suficiently to restore the diameter toits normal size, and if, on the other hand, the wood shrinks and becomessmaller than the outer tube the spring 6 forces the tongue cl outwardsufficiently to maintain an even pressure in the tube. The tongue 6?therefore, as is seen,com'- pensates for all the variations in the sizeof the wooden section, yielding when the section swells and springingoutward when it shrinks, and thus maintaining a fixed diameter andinsuring an even and constant pressure of the wooden section in theouter tube. It is found that one such tongue or a tongue on one side ofthe section is sufficient to accomplish the purpose desired, thecompression of the tongue on one side compensating for the swelling inall directions of the wooden section.

The cleft c, and consequently the tongue cl, may be of any form andconstruction desired, but I prefer the construction shown in thedrawings. As there seen, the cleft is circular and is merely a saw-cleftformed by a barrelsaw, and the spring used is a curved steel band,whichfits in the curved cleft and should be of such a size as to force theouter end of the tongue d slightly outward and permit the end of thetongue to be pressed inward below the circumference of the section.

What I claim is 1. In an extension-roller, in combination, anextension-piece adapted to slide in a section of the roller;aspring-section connected therewith, whereby the extension-piece iscapable of expansion and compression 3 and a spring situated between thespring-section and the extension-piece, substantially as described.

2. In an extension-roller, the wooden extension-piece a, having thespring-tongue d,

curved cleft c and curved spring 6, whereby the eXtensionpiece maintainsa uniform and even pressure in the roller, substantially as described.

Signed at Newark, in the county of Essex and State of New Jersey, this10th day of June, A. D. 1897.

EDMUND F. HARTSHORN.

Witnesses:

E. L. DURGIN, GEo. GUNTHER.

